high optical power output, tuning range, and room temperature
operation make QCLs ideal for spectroscopic applications such as
remote sensing of environmental gases and pollutants in the
Industrial process control, and medical diagnostics are being developed with QCLs. Infra red emitters in the 2-5 μm atmospheric window are finding uses where Gold coated mirrors or Molybdenum mirrors, which combine high reflectivity and chemical inertness, are perfect.
Protected silver coated mirrors based on aluminum or copper substrates can give good infrared reflectivity (99%) and visible reflectance (99%) , useful for alignment and adjustment.
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